I found it out, partly, myself. The document
RC1.1/publishing/architecture/computable/terminology/Terminology.xsd.html
(in my local copy of the repository) was very helpful.

I, now, more or less understand the structure of classes which form the 
terminology.

*Please correct me if I am wrong.*

It all boils down to the concept/language which will be represented in 
the terminology-access.

This looks like this

id: String
all_codes: Set<CODE_PHRASE>
codes_for_group_id (group_id: String): Set<CODE_PHRASE>
codes_for_group_name (name, lang: String): Set<CODE_PHRASE>
rubric_for_code (code, lang: String): String

So, the groups (grouper) are visible in Group_id, which can be retrieved 
by querying the OPENEHR_TERMINOLOGY_GROUP_IDENTIFIERS Class.

The openehr terminologies are all in the file terminology.xml, organised 
in the structure which is described in the above html-file. This is very 
good.

There is one minor problem, the group_id's in the class do not sync 100% 
with the group-id's in the xml-file.

Here is a question
*Which one will prevail, that from xml, or that from PDF?
*
I found out, that there are some codes which have a structure that does 
not fit in terminology_access, because they have more "fields" like 
territory and terminologyidentifier, mediatype.
*How to handle these?

*Finally, there is the property-unit-propertyuntit structure. It looks 
like, but I am not sure, that these are for, I can guess. But maybe my 
guess is wrong, the terminolgoyaccess class does not offer space for 
properties.
*How to handle these, what are these for

*Thanks for your attention

Bert
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